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    <title>Document</title>
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    <script>

        // es6  语法糖

        // 语法

        // class 构造函数的名字 {
        //     constructor() {
        //         属性
        //     }
        //     say(){} 

        //     speak(){}
        // }

        class Person {
            constructor(name , age) {
                this.name = name ;
                this.age = age ;
            }
            say() {
                console.log('say')
            }
        }


        const p = new Person('cc' , 20) ;
        console.log(p);
        p.say()

        console.log(p.constructor);

        console.log(p instanceof Person);

    </script>
    
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